You can try to use a synchronised local folder such as Google Drive, One drive or Synology Drive. But it doesn't work. The data store has a hissy fit if you try to direct two PCs to the same synced drive. Each PC will only see some of the content.

Well that answers that. I never had the need to try it. If they ever implement it, it will have to be fully network aware, caching locally of the server is down etc.If you really need to get your stuff on multiple machines but not at the same time, symlink into a dropbox or Pcloud folder and then you have it elsewhere and can grab what you need out of it

You won't need to be network aware if they implement a solution that uses Google Drive, One Drive and Synology Drive because those just act like local folders but give you the protection of cloud or private cloud sync.

If they implement it to a network share you will need to be network aware because then you will have to sync that share to an online resource.

The first option is by far and away the better solution, for performance reasons - local read / write speeds - and resilience in case of a network outage.